point.comJava Super Keyword
In Java language, the super keyword is used to invoke the base class constructor or method or instance variable.
Syntax:
super;
Example:-
To invoke the base class instance variable using super keyword.
class A
{
int a=10;
void showdata()
{
System.out.println("Base class a value: "+ a);
}
}
class B extends A
{
int a=5;
void showdata()
{ // super invoke the a value from base class
System.out.println("Derived class a value: "+ super.a);
}
}
public class Supermethod
{
public static void main(String args[])
{
B b= new B();
b.showdata();
}
}
Example:-
To invoke the base class method using super keyword.
class A
{
int a=10;
void showdata()
{
System.out.println("Base class a value: "+ a);
}
}
class B extends A
{
int a=5;
void showdata()
{
super.showdata();// super invoke the method from base class
System.out.println("Derived class a value: "+ a);
}
}
public class Supermethod
{
public static void main(String args[])
{
B b= new B();
b.showdata();
}
}
Example:-
To invoke the base class constructor using super keyword.
class A
{
int a=10;
A()
{
System.out.println("Base class a value: "+ a);
}
}
class B extends A
{
int a=5;
B()
{
super();
System.out.println("Derived class a value: "+ a);
}
}
public class Superconstructor
{
public static void main(String args[])
{
B b= new B();
}
}
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